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Fleming and his fiancee met through an online dating and escort service website called myRedbook.com.

On Wednesday, sheriff's deputies said they suspect Fleming received help from an escort he also met on myRedBook after the homicide to escape from the South Sacramento area. The chief's Cal Fire truck was found abandoned in Elk Grove, Calif.

Fleming, 55, was a 24-year veteran of Cal Fire. He likely still has keys in his possession to fire gates, trails and Cal Fire facilities throughout the state, investigators said.

Officials said Fleming has spent a lot of time in the Santa Cruz mountains and is an avid outdoorsman. Santa Cruz County deputies said they are keeping an eye out for Fleming.

Douglas suffered a brutally violent death.

According to an arrest warrant, her body was face down in the master bedroom when her sister and a friend found her. A sheet was tied around her neck and she had been stabbed numerous times. Blood was splattered on the bedroom's bed and walls.

Detectives who were called to the home said they smelled gas in the garage when they arrived, and found large wrenches near the water heater, indicating someone may have been trying to cause a fire or explosion.

Stephanie Douglas, Sarah Douglas' sister, told investigators that the night before her sister's death they went with their mother to a casino. Sarah told them she intended to leave Fleming.

Stephanie called her sister after returning from the casino and heard Sarah and Fleming arguing, the arrest warrant states. Stephanie told police that she heard her sister scream and someone grab the phone before it went dead. When she tried calling back, the phone went straight to voicemail. Sarah also never replied to any of Stephanie's text messages.

After the killing, “We believe someone picked him up and took him somewhere,” Sacramento County Sheriff’s Department spokeswoman Sgt. Lisa Bowman said. “We do not know who that is."

Fleming is believed to have two guns with him -- a .45-caliber pistol and a .25-caliber pistol.

Fleming worked in a Cal Fire office in Ione, Calif. He has since been fired by Cal Fire because he failed to report to work for five consecutive days, Cal Fire officials said.

Deputies are asking anyone who may have had contact with Fleming to call the Sacramento County Sheriff’s Department at 916-874-8477.